WUBEN E7 Extension Tube User Manual

1. Introduction

The WUBEN E7 Extension Tube (Model E7YCT) is an essential accessory designed to enhance the functionality and runtime of your WUBEN E7 Headlamp. By replacing the standard battery compartment, this extension tube allows the use of a larger 18650 lithium-ion battery, significantly increasing the headlamp's endurance for extended outdoor activities, camping, running, and other lighting needs.

Figure 1: WUBEN E7 Extension Tube

2. Safety Information

• Ensure the headlamp is turned off before installing or removing the extension tube and battery.
• Use only compatible 18650 lithium-ion batteries.
• Avoid cross-threading when attaching the extension tube to the headlamp body or tail cap.
• Keep the extension tube and headlamp away from extreme temperatures and corrosive materials.

3. Setup and Installation

Follow these steps to install the WUBEN E7 Extension Tube onto your WUBEN E7 Headlamp:

1. Ensure your WUBEN E7 Headlamp is turned off.
2. Unscrew the original tail cap from the WUBEN E7 Headlamp body. Remove the existing 18350 battery if present.
3. Carefully screw the WUBEN E7 Extension Tube onto the main body of the headlamp, ensuring the threads align properly to avoid cross-threading.
4. Insert a compatible 18650 lithium-ion battery into the extension tube with the positive (+) terminal facing towards the headlamp head. (Flat-top 18650 batteries are recommended for optimal contact).
5. Screw the original tail cap onto the end of the newly attached extension tube until it is securely tightened.

Figure 2: WUBEN E7 Headlamp size comparison with and without the extension tube.

4. Operating Instructions

Once the WUBEN E7 Extension Tube and 18650 battery are securely installed, your WUBEN E7 Headlamp will operate as normal. The extension tube simply provides a larger compartment for a higher-capacity battery, extending the headlamp's runtime without altering its operational modes or features.

Figure 3: WUBEN E7 Headlamp with extension tube installed.

5. Maintenance

• Keep the threads of the extension tube and headlamp clean and free from debris to ensure smooth assembly and good electrical contact.
• Periodically inspect O-rings for wear and tear. Replace if necessary to maintain water resistance.
• Store the extension tube in a dry, cool place when not in use.
• Avoid dropping the extension tube or subjecting it to strong impacts.

6. Troubleshooting

If your WUBEN E7 Headlamp does not function after installing the extension tube:

• Check Battery Polarity: Ensure the 18650 battery is inserted with the positive (+) terminal facing towards the headlamp head.
• Secure Connections: Make sure the extension tube is fully screwed onto the headlamp body and the tail cap is fully screwed onto the extension tube. Loose connections can interrupt power.
• Battery Charge: Verify that the 18650 battery is charged.
• Battery Type: Confirm you are using a compatible 18650 battery, preferably a flat-top type.

7. Specifications

8. User Tips

• Many users find the extension tube to be a mandatory accessory as it greatly enhances the comfort and grip of the WUBEN E7 Headlamp, especially when used handheld.
• The extension tube is ideal for situations requiring extended runtime, such as long hikes, overnight camping, or extended work sessions where frequent recharging is not feasible.
• For maximum autonomy, consider carrying a spare 18650 battery along with the extender in your gear.
• Ensure you use flat-top 18650 batteries for proper electrical contact within the extension tube.

9. Warranty and Support

For warranty claims, technical support, or any inquiries regarding your WUBEN E7 Extension Tube, please refer to the official WUBEN website or contact your authorized WUBEN dealer. Keep your purchase receipt as proof of purchase.

For detailed operational instructions of the WUBEN E7 Headlamp itself, please consult the headlamp's dedicated user manual, which may be available as a PDF document from the manufacturer.